Appendix A Troubleshooting; Solving Common Problems - HP L1750 User Manual

A Troubleshooting

Solving Common Problems

The following table lists possible problems, the possible cause of each problem, and the recommended
solutions.
Problem
Screen is blank.
Screen image appears distorted; text is
fuzzy or blurred; image quality is
degraded.
Image appears blurred, indistinct, or
too dark.
Image is not centered
Check Video Cable is displayed on
screen.
Input Signal Out of Range. Change
Settings to 1280 x 1024 @ 60Hz (17"
and 19" 5:4 models) OR Input Signal
Out of Range. Change Settings to
1440 x 900 @ 60Hz (19" wide panel
models) OR Input Signal Out of
Range. Change Settings to 1680 x
1050 @ 60Hz (22" wide panel models)
Possible Cause
Power cord is disconnected.
Power button on front panel of
the monitor is turned off.
Video cable is improperly
connected.
Screen blanking is active.
The computer's graphics card
resolution is set lower or higher
than the monitor's native
resolution.
Brightness and contrast are
too low.
Position may need adjustment. Press the
Monitor video cable is
disconnected.
Video resolution and/or refresh
rate are set higher than what
the monitor supports.
Solution
Connect the power cord.
Press the front panel power button.
NOTE: If pressing the power button has no effect,
press and hold the power button for 10 seconds to
disable the power button lockout feature.
Connect the video cable properly. Refer to Chapter
3, Setting Up the Monitor on page 5
information.
Press any key on the keyboard or move the mouse
to inactivate the screen blanking utility.
Set the computer's display resolution to the same
mode as the monitor's recommended native screen
resolution to provide the best picture quality.
Press the —/Adjust button on the front panel. If this
does not correct the image, press the
to open the OSD Menu, and adjust the brightness
and contrast scales as needed.
Menu button to access the OSD menu.
Select Image Control/Horizontal Position
Position to adjust the horizontal or vertical position
of the image.
Connect the DVI-D signal cable to the DVI connector
on the computer (select models), or the VGA cable
to the VGA connector on the computer. Be sure that
the computer power is off while connecting the video
cable.
Restart the computer and enter Safe Mode. Change
the settings to a supported setting (see
Preset Display Resolutions on page
the computer so that the new settings take effect.
Solving Common Problems
for more
Menu button
or Vertical
Recognizing
49). Restart
35